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http://dx.doi.org/10.7740/kjcs.2016.61.1.009

Bakanae Disease Reduction Effect by Use of Silicate Coated Seed in Wet Direct-Seeded Rice  

Kang, Yang-Soon (Saturn Bio Tec Co., Ltd.)
Kim, Wan Joong (Saturn Bio Tec Co., Ltd.)
Kim, Yeon Ju (Department of Oriental Medicinal Material and Processing, College of Life Science, Kyung Hee University)
Jung, Ki-Hong (Department of Plant Molecular System Biotechnology & Crop Biotech Institute, Kyung Hee University)
Choi, Ul-Su (Department of Oriental Medicinal Material and Processing, College of Life Science, Kyung Hee University)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.61, no.1, 2016 , pp. 9-16 More about this Journal
Abstract
To investigate the effect of soluble silicate zeolite dressing of the rice against bakanae disease, field trial in reclaimed land and in vitro were carried out. The coated rice seeds (SCS) which were dressed with the mixture of 25% silicic acids (binder), and the zeolite (coating powder). In wet direct seeding, uniform scattering of rice seeds on the soil surface and the better seedling establishment were shown in SCS treatment plots. The incidence of bakanae disease began from the mid tillering stage toward the heading stage. Around heading stage, the ratio of infected tillers reached its highest point by 9.9% in non-SCS treatment plots. While, in SCS treatment plots, the ratio of infected tillers was no more than 0.01%. The vitality of the pathogenic fungi of bakanae disease in the SCS and non-SCS samples were assessed. Samples were incubated for one week keeping proper humidity at $30^{\circ}C$ after inoculated with panicles of infected rice plants from experimental field plots. In non-SCS treatment, pinkish colonies were formed on the grain surface of panicle of infected plants, and mycelium, macro-conidia and micro-conidia were developed actively inside part of infected grain inoculated. While in SCS treatment, micro-conidia and mycelium were not survived and the growth of macro-conidia, mycelia were greatly inhibited and withered. Based on the results, it is concluded that the environmental friendly control of bakanae disease by use of SCS is possible and soluble silicate can be applied as agents for replacement of seed disinfection.
Keywords
Bakanae disease; Colony; Macro-conidia; Micro-conidia; Mycelium; Seed-borne; Silicate coated rice seed; Wet direct-seeded rice;
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Times Cited By KSCI : 8  (Citation Analysis)
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